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Achiever Study Plan ESE-2018:Power Electronics Quiz 5
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Question 1
Consider the following statements:
1) The voltage developed across the OFF switches of the half bridge converter is the maximum dc link voltage.
2) In the full bridge converter, the voltage across the primary of the transformer is the dc link voltage.
3) The voltage developed across the OFF switches of the full bridge converter in half the maximum dc link votage.
Which of the above statements are correct?
1) The voltage developed across the OFF switches of the half bridge converter is the maximum dc link voltage.
2) In the full bridge converter, the voltage across the primary of the transformer is the dc link voltage.
3) The voltage developed across the OFF switches of the full bridge converter in half the maximum dc link votage.
Which of the above statements are correct?
Question 2
What is the power factor of a single phase a.c. regulator feeding a resistive load?
Question 3
A freewheeling diode in phase-controlled rectifiers
Question 4
Consider the following statements about IGBT
1. It has high input impedance.
2. It has low ON state voltage drop.
3. Its switching speed is higher than that of the MOSFET.
4. It is a voltage controlled device.
Which of the above statements are correct?
1. It has high input impedance.
2. It has low ON state voltage drop.
3. Its switching speed is higher than that of the MOSFET.
4. It is a voltage controlled device.
Which of the above statements are correct?
Question 5
Maximum string efficiency is achieved when
Question 6
Consider the following statements:
SCR can be turned on by
1. Applying anode voltage at a sufficiently fast rate
2. Applying sufficiently large anode voltage
3. Increasing the temperature of SCR to sufficiently large value
4. Applying sufficiently large gate current
Which of the above statements are correct ?
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